Diff: main.cpp

Revision:

0:62ea25b8c31d

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Fri May 27 06:57:55 2016 +0000
@@ -0,0 +1,173 @@
+// LedMatrix  1mai 
+
+#include "mbed.h"
+ 
+DigitalOut led(dp28);
+
+// spi(mosi,miso,sck)
+SPI max72_spi(dp2, NC, dp6);
+DigitalOut load(dp14);//spi load
+
+// CPU       MT7219
+// dp1 mosi(Master In Salve Out) =>   DIN
+// dp2 miso(Master OutSlave)   =>   nc
+// dp6 sck (Serial Clock) =>   clk
+// dp14 =>(Slave Select) load
+ 
+int maxInUse = 1;    //change this variable to set how many MAX7219's you'll use
+ 
+// define max7219 registers
+#define max7219_reg_noop         0x00
+#define max7219_reg_digit0       0x01
+#define max7219_reg_digit1       0x02
+#define max7219_reg_digit2       0x03
+#define max7219_reg_digit3       0x04
+#define max7219_reg_digit4       0x05
+#define max7219_reg_digit5       0x06
+#define max7219_reg_digit6       0x07
+#define max7219_reg_digit7       0x08
+#define max7219_reg_decodeMode   0x09
+#define max7219_reg_intensity    0x0a
+#define max7219_reg_scanLimit    0x0b
+#define max7219_reg_shutdown     0x0c
+#define max7219_reg_displayTest  0x0f
+ 
+#define LOW 0
+#define HIGH 1
+#define MHZ 1000000
+#define ON 1
+#define OFF 0
+
+void maxSingle( int reg, int col) {
+//maxSingle is the "easy"  function to use for a
+//single max7219
+    load = LOW;            // begin
+    max72_spi.write(reg);  // specify register
+    max72_spi.write(col);  // put data
+    load = HIGH;           // make sure data is loaded (on rising edge of LOAD/CS)
+}
+ 
+void maxAll (int reg, int col) {    // initialize  all  MAX7219's in the system
+    load = LOW;                    // begin
+    for ( int c=1; c<= maxInUse; c++) {
+        max72_spi.write(reg);  // specify register
+        max72_spi.write(col);  // put data
+    }
+    load = HIGH;
+}
+ 
+void maxOne(int maxNr, int reg, int col) {
+//maxOne is for adressing different MAX7219's,
+//while having a couple of them cascaded
+    int c = 0;
+    load = LOW;
+ 
+    for ( c = maxInUse; c >= maxNr; c--) {
+        max72_spi.write(0);  // no-op
+        max72_spi.write(0);  // no-op
+    }
+ 
+    max72_spi.write(reg);  // specify register
+    max72_spi.write(col);  // put data
+ 
+    for ( c=maxNr-1; c >= 1; c--) {
+        max72_spi.write(0);  // no-op
+        max72_spi.write(0);  // no-op
+    }
+    load = HIGH;
+}
+  
+void setup () {
+    // initiation of the max 7219
+    // SPI setup: 8 bits, mode 0
+    max72_spi.format(8, 0);
+    
+    // going by the datasheet, min clk is 100ns so theoretically 10MHz should work...
+    // max72_spi.frequency(10*MHZ);
+    
+    maxAll(max7219_reg_scanLimit, 0x07);
+    maxAll(max7219_reg_decodeMode, 0x00);  // using an led matrix (not digits)
+    maxAll(max7219_reg_shutdown, 0x01);    // not in shutdown mode
+    maxAll(max7219_reg_displayTest, 0x00); // no display test
+    for (int e=1; e<=8; e++) {    // empty registers, turn all LEDs off
+        maxAll(e,0);
+    }
+    maxAll(max7219_reg_intensity, 0x0f & 0x0f);    // the first 0x0f is the value you can set
+    // range: 0x00 to 0x0f
+} 
+ 
+void led_flash(){
+    int i;
+    for(i=0;i<3;i++){
+        led=ON;
+        wait(0.1);
+        led=OFF;
+        wait(0.1);
+    }
+}
+
+int main(void) {
+
+    const uint64_t moji_font[] = {// bold font , kagami moji font
+        0x3c66666e76663c00,//0~9
+        0x7e1818181c181800,
+        0x7e060c3060663c00,
+        0x3c66603860663c00,
+        0x30307e3234383000,
+        0x3c6660603e067e00,
+        0x3c66663e06663c00,
+        0x1818183030667e00,
+        0x3c66663c66663c00,
+        0x3c66607c66663c00,
+    };
+    
+    int i,j,k;
+    uint8_t bitsum[1][8],bit1gyou,bitline[80];
+    uint64_t moji1;
+    
+    setup();
+    led_flash();
+    wait(0.1);
+    
+    while(1){
+       
+        for(i=0;i<10;i++){
+            moji1=moji_font[i];// 0~9 
+            for(j=0;j<8;j++){
+                bitsum[i][j]=0;
+            }
+            for(j=0;j<8;j++){
+                bit1gyou=moji1 & 0xff;
+                for(k=0;k<8;k++){// kagamimoji no font
+                //for(k=8;k>=1;k--){ // futuu no font
+                    bitsum[i][k]=bitsum[i][k]+(bit1gyou & 0x01)*pow((double)2,(double)(j));
+                    bit1gyou=bit1gyou >> 1;
+                 }//i
+                 moji1=moji1 >> 8; 
+            }//j
+        }
+        
+        k=0;
+        for(i=0;i<10;i++){// scroll data henkan
+            for(j=0;j<8;j++){
+                bitline[k]=bitsum[i][j];
+                k++;
+            }
+        }
+        
+        for(i=0;i<80-8;i++){ //scroll hyouji      
+            maxSingle(1,bitline[i+0]);
+            maxSingle(2,bitline[i+1]);
+            maxSingle(3,bitline[i+2]);
+            maxSingle(4,bitline[i+3]);
+            maxSingle(5,bitline[i+4]);
+            maxSingle(6,bitline[i+5]);
+            maxSingle(7,bitline[i+6]);
+            maxSingle(8,bitline[i+7]);
+            wait(0.1);
+        }
+                       
+    }//while
+}//main
+
+